CN102931414A - Preparation process for copper foil for lithium ion battery current collector - Google Patents
Preparation process for copper foil for lithium ion battery current collector Download PDFInfo
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- CN102931414A CN102931414A CN2012104301780A CN201210430178A CN102931414A CN 102931414 A CN102931414 A CN 102931414A CN 2012104301780 A CN2012104301780 A CN 2012104301780A CN 201210430178 A CN201210430178 A CN 201210430178A CN 102931414 A CN102931414 A CN 102931414A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention relates to an electrochemical coating film and particularly relates to a preparation process for a copper foil for a lithium ion battery current collector. The preparation method comprises the steps of: firstly, carrying out local insulating treatment on the surface of an electro-deposition roller of an electrolytic copper foil to form a lattice point shaped pattern; then, carrying out an electro-deposition process for the electrolytic copper foil, wherein the copper foil obtained by deposition is a mesh-shaped foil sheet with the lattice point pattern consistent with that of the electrical insulating region. According to the preparation process for the copper foil for the lithium ion battery current collector, the mesh-hole-shaped copper foil for the cathode current collector of the lithium ion battery is prepared, the weight ratio of the copper foil in the cathode piece in the lithium ion battery can be reduced, the unit weight capacity of the cell is improved, and the preparation process can be compatible with the copper foil production device used in the existing lithium ion battery production; and the preparation process can be achieved only by improving the existing copper foil production device part, namely the electro-deposition roller.
Description
Technical field
The present invention relates to electrochemical filming, especially a kind of affluxion body in lithium ion batteries preparation technology of Copper Foil.
Background technology
Lithium (ion) battery is now widely used a kind of secondary technology, and it is large to have a capacity, the advantage such as volume is little, and is lightweight.In the existing lithium ion battery, usually use Copper Foil as the electrojet body of negative pole, at copper foil surface coating negative material, form negative plate; Aluminium foil is anodal electrojet body, at aluminium foil surface coating positive electrode active materials, forms positive plate; Positive plate and negative plate are superimposed together after isolating by barrier film, have namely formed a lithium ion battery.The capacitance of the every monomer weight of battery is an important indicator of lithium ion performance, improves the capacitance of battery Unit Weight, is important and lasting problem of technical field of lithium ion.
The most frequently used negative material is generally the material with carbon element of graphite, semi-graphited in the at present lithium ion battery industry, and negative current collector is generally Copper Foil.As the graphite of negative material, the material with carbon element of semi-graphited, with respect to positive electrode, the easily large and density less of Unit Weight, the applied thickness of negative material is generally about 1/3 of positive electrode applied thickness on the pole piece; With respect to the Copper Foil collector, the density of carbon negative pole material is about 1/6 of Copper Foil, in negative plate, the occupied ratio of the weight of Copper Foil is 30～40%, in whole battery, the weight accounting of Copper Foil is about 10%, if in negative plate, can reduce the consumption of Copper Foil, just can reduce to a certain extent the weight of battery, promote the capacitance of battery Unit Weight, using netted Copper Foil is an effective approach.
During lithium battery is produced at present, part has used copper mesh cloth as negative current collector, similar with the weight accounting effect of copper current collector in the aforesaid minimizing negative plate, a problem of copper mesh cloth is, during production need with the metallic copper wire drawing, and then copper wire is woven into screen cloth, cost is higher, and the used copper wire string diameter of screen cloth is thicker, has to a certain degree reduced it and has promoted the effect of battery Unit Weight capacitance.
Summary of the invention
The purpose of this invention is to provide a kind of affluxion body in lithium ion batteries with the preparation technology of Copper Foil, can prepare the Copper Foil with mesh, can improve the Unit Weight gram volume of battery after the use.
A kind of affluxion body in lithium ion batteries preparation technology of Copper Foil, its special feature is, comprising the steps: at first to carry out on the electro-deposition roller surface of electrolytic copper foil minor insulation processes, form the figure of net-point shape, and then carrying out the electrodeposition technology of electrolytic copper foil, the Copper Foil that obtains after the deposition is the mesh paillon foil consistent with the site figure in electric insulation zone.
Wherein carry out minor insulation on the electro-deposition roller surface of electrolytic copper foil and process, adopt laser cladding process, plasma sputtering coating process or chemical etching technology to realize.
Wherein laser cladding process is specifically on the laser cladding of coating treatment facility, at first utilize the mode of Electrostatic Absorption at the compound powder of electro-deposition roller Adsorption on Surface one deck electric insulation, then form the zone on electric insulation surface at needs, laser beam is focused on the electric insulation powder bed of electro-deposition roller Adsorption on Surface, utilize the high temperature of laser beam irradiation, make the compound powder fusing of electric insulation, be formed on the rete of electro-deposition roller surface firm attachment.
Further, wherein the compound of electric insulation adopts aluminium oxide, silicon dioxide, silicon nitride or zirconium dioxide.
Wherein the concrete steps of plasma sputtering coating process are as follows:
(1) electro-deposition roller cleaning surfaces: the service quality mark is that 1%～5% NaOH solution cleans electro-deposition roller surface, and then repeatedly washes 10～20 minutes with deionized water;
(2) photoresists coating: under gold-tinted or dark surrounds, at the surface uniform coating photoresists of electro-deposition roller, then under 80～90 degree celsius temperature, dried 10～20 minutes, obtain thickness and be 10～50 microns photoresists rete;
(3) patterning: use the laser graphics scanning device, at electro-deposition roller surface scan electric insulation district site figure, after in the NaOH solution of electro-deposition roller immersion mass fraction 0.1～1% 1～5 minute, obtain the electric insulation regional graphics after finishing;
(4) the electro-deposition roller that will finish the preparation of electric insulation regional graphics is put into the plasma sputtering filming equipment, plates needed rete, 5 to 100 microns of thicknesses of layers;
(5) the electro-deposition roller is taken out from sputtering coating equipment after, immerse in the NaOH solution of mass fraction 1%～10% and soaked 10 to 20 minutes, repeatedly wash with deionized water afterwards and got final product in 10 to 20 minutes.
The present invention proposes a kind of affluxion body in lithium ion batteries preparation technology of Copper Foil, can prepare the Copper Foil with mesh, be used for the lithium ion battery negative collector, can reduce the Copper Foil weight accounting in the negative plate in the lithium ion battery, improve the Unit Weight gram volume of battery, and the Copper Foil production equipment that can be compatible existing lithium ion battery uses in producing only needs existing Copper Foil production equipment parts, and namely the electro-deposition roller just improves and can realize.
Embodiment
The present invention is the preparation technology that a kind of affluxion body in lithium ion batteries is used Copper Foil, before the technique of carrying out the electrolytic copper foil electro-deposition, carry out local insulation processing on the electro-deposition roller surface of electrolytic copper foil, form the figure (as: array of circle, ellipse, rectangle equal-specification shape) of net-point shape, zone through the surface insulation processing, no current passes through in electrodeposition process, do not have elemental copper to separate out, the Copper Foil that obtains after the deposition is the mesh paillon foil consistent with the site figure in electric insulation zone.
The electric insulation that forms on electro-deposition roller surface zone, 1) the continuous smooth surface of the zone of electric insulation and the formation of non-electric insulation zone does not have step between the two; 2) the electric insulation zone is discrete smooth surface with non-electric insulation zone, form the step that exceeds non-electric insulation zone through the zone that electric insulation is processed, its height can decide according to the difference of prepared copper thickness, and the shoulder height scope can be from 0～100 micron; 3) the electric insulation regional graphics are the net-point shape graphic array, and the site figure can be circular, oval, square, the prismatic of rule, do not plan figure etc. that the dot density size and shape all can be decided as required.
The electric insulation zone that forms on electro-deposition roller surface, its formation method has following several:
(1) laser cladding of coating method: laser cladding of coating method technical process is: at first utilize the mode of Electrostatic Absorption at the compound powder of the Adsorption on Surface last layer electric insulation of electro-deposition roller, as: aluminium oxide, silicon dioxide, silicon nitride, zirconium dioxide etc.; Then form the zone on electric insulation surface at needs, laser beam is focused on the electric insulation powder bed of electro-deposition roller Adsorption on Surface, utilize the high temperature of laser beam, make the compound powder fusing of electric insulation, form the rete with electro-deposition roller surface firm attachment;
(2) plasma sputtering coating method: the plasma sputtering coating method is widely used film plating process, use the method for plasma sputtering, the compound rete that electro-deposition roller surface sputtering in needs formation electric insulation zone insulate, thicknesses of layers can be from 0 to several microns; Increase electric insulation zone thicknesses of layers such as need, can after finishing insulating regions electric insulation rete plated film, use the mode of chemical corrosion, a part is fallen in the surface corrosion in non-electric insulation zone.
The present invention can be on existing electrolytic copper foil production technology basis, insulating is carried out on electro-deposition roller surface wherein to be processed, form the electric insulation figure of net-point shape on the surface of electro-deposition roller, other technological parameter and condition only need be carried out small adjustment, can be for the preparation of the Copper Foil of affluxion body in lithium ion batteries.The Copper Foil that the present invention proposes is the net foil of hollow out, and the mesh pattern shape of web, pattern magnitude, reticular density, arrangement mode all can arrange flexibly.This Copper Foil is used for the preparation of existing lithium ion battery, but the Unit Weight capacitance of Effective Raise battery.
Embodiment 1:
Form electric insulation site figure by the laser cladding of coating method on the electro-deposition surface:
Laser cladding of coating method technical process is: on the laser cladding of coating treatment facility, at first utilize the mode of Electrostatic Absorption at the alumina powder of the Adsorption on Surface last layer electric insulation of electro-deposition roller; Then form the zone on electric insulation surface at needs, be the round dot in the circular dot matrix, laser beam focused on the electric insulation powder bed of electro-deposition roller Adsorption on Surface, utilize the high temperature of laser beam, make the compound powder fusing of electric insulation, form the rete with electro-deposition roller surface firm attachment;
Use the electro-deposition roller of processing through insulation patterns, by normal electrolytic copper foil production technology, prepare required netted Copper Foil.
Embodiment 2:
The plasma sputtering coating method:
Electro-deposition roller cleaning surfaces: the service quality mark is that 2% NaOH solution cleans electro-deposition roller surface, remove the pollutants such as greasy dirt on surface after, repeatedly washed 15 minutes with deionized water;
The photoresists coating: under gold-tinted or dark surrounds, at the surface uniform coating photoresists of electro-deposition roller, then 30 microns of film thickness dried 10 minutes under 85 degree celsius temperature;
Patterning: use the laser graphics scanning device, form electric insulation district site figure at electro-deposition roller surface scan, the array that adopts a plurality of identical rectangular to form in this example immerses the electro-deposition roller in the NaOH solution of mass fraction 0.5% after finishing, after 3 minutes, obtain the electric insulation regional graphics.The electro-deposition roller is taken out from NaOH solution, use deionized water rinsing 5 minutes, the NaOH solution on electro-deposition roller surface is rinsed well.With 110 ℃ of dim winds 10 minutes, fully dry to the photosensitive layer on electro-deposition roller surface.
The electro-deposition roller of finishing the preparation of electric insulation regional graphics is put into the plasma sputtering filming equipment, plate needed rete, 20 microns of thicknesses of layers.
After the electro-deposition roller taken out from sputtering coating equipment, immerse in the NaOH solution of mass fraction 5% and soaked 10 minutes, repeatedly washed 10 minutes with deionized water afterwards.
Use the electro-deposition roller of processing through insulation patterns, by normal electrolytic copper foil production technology, prepare required netted Copper Foil.
Claims (5)
1. an affluxion body in lithium ion batteries is with the preparation technology of Copper Foil, it is characterized in that, comprising the steps: at first to carry out on the electro-deposition roller surface of electrolytic copper foil minor insulation processes, form the figure of net-point shape, and then carrying out the electrodeposition technology of electrolytic copper foil, the Copper Foil that obtains after the deposition is the mesh paillon foil consistent with the site figure in electric insulation zone.
2. a kind of affluxion body in lithium ion batteries as claimed in claim 1 is with the preparation technology of Copper Foil, it is characterized in that: wherein carry out minor insulation on the electro-deposition roller surface of electrolytic copper foil and process, adopt laser cladding process, plasma sputtering coating process or chemical etching technology to realize.
3. a kind of affluxion body in lithium ion batteries as claimed in claim 1 is with the preparation technology of Copper Foil, it is characterized in that: wherein laser cladding process is specifically on the laser cladding of coating treatment facility, at first utilize the mode of Electrostatic Absorption at the compound powder of electro-deposition roller Adsorption on Surface one deck electric insulation, then form the zone on electric insulation surface at needs, laser beam is focused on the electric insulation powder bed of electro-deposition roller Adsorption on Surface, utilize the high temperature of laser beam irradiation, make the compound powder fusing of electric insulation, be formed on the rete of electro-deposition roller surface firm attachment.
4. a kind of affluxion body in lithium ion batteries as claimed in claim 3 is with the preparation technology of Copper Foil, and it is characterized in that: wherein the compound of electric insulation adopts aluminium oxide, silicon dioxide, silicon nitride or zirconium dioxide.
5. a kind of affluxion body in lithium ion batteries as claimed in claim 1 is with the preparation technology of Copper Foil, and it is characterized in that: wherein the concrete steps of plasma sputtering coating process are as follows:
(1) electro-deposition roller cleaning surfaces: the service quality mark is that 1%～5% NaOH solution cleans electro-deposition roller surface, and then repeatedly washes 10～20 minutes with deionized water;
(2) photoresists coating: under gold-tinted or dark surrounds, at the surface uniform coating photoresists of electro-deposition roller, then under 80～90 degree celsius temperature, dried 10～20 minutes, obtain thickness and be 10～50 microns photoresists rete;
(3) patterning: use the laser graphics scanning device, at electro-deposition roller surface scan electric insulation district site figure, after in the NaOH solution of electro-deposition roller immersion mass fraction 0.1～1% 1～5 minute, obtain the electric insulation regional graphics after finishing;
(4) the electro-deposition roller that will finish the preparation of electric insulation regional graphics is put into the plasma sputtering filming equipment, plates needed rete, 5 to 100 microns of thicknesses of layers;
(5) the electro-deposition roller is taken out from sputtering coating equipment after, immerse in the NaOH solution of mass fraction 1%～10% and soaked 10 to 20 minutes, repeatedly wash with deionized water afterwards and got final product in 10 to 20 minutes.
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| CN201210430178.0A CN102931414B (en) | 2012-11-01 | 2012-11-01 | Preparation process for copper foil for lithium ion battery current collector |
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| CN201210430178.0A CN102931414B (en) | 2012-11-01 | 2012-11-01 | Preparation process for copper foil for lithium ion battery current collector |
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| CN102931414A true CN102931414A (en) | 2013-02-13 |
| CN102931414B CN102931414B (en) | 2015-03-11 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993153A (en) * | 2015-07-13 | 2015-10-21 | 深圳市信宇人科技有限公司 | Production method of microporous copper foil, microporous copper foil and production device thereof |
| CN108110329A (en) * | 2018-01-09 | 2018-06-01 | 深圳市信宇人科技股份有限公司 | For making the production method of the cathode roll of metal micro-holes and its cathode roll |
| CN108950608A (en) * | 2018-08-16 | 2018-12-07 | 安徽铜冠铜箔有限公司 | A kind of new netted copper foil preparation method |
| CN109065833A (en) * | 2018-06-28 | 2018-12-21 | 合肥国轩高科动力能源有限公司 | Surface treatment method for porous current collector of silicon-carbon composite negative plate of lithium battery |
| CN109103503A (en) * | 2018-07-18 | 2018-12-28 | 惠州亿纬锂能股份有限公司 | The preparation method of lithium ion battery |
| CN109148892A (en) * | 2018-08-07 | 2019-01-04 | 北京科技大学 | A kind of preparation method of the three-dimensional porous copper foil of anode of lithium ion battery collector |
| CN109494374A (en) * | 2018-11-12 | 2019-03-19 | 桑顿新能源科技有限公司 | Lithium ion battery silicon-carbon cathode piece and preparation method thereof |
| CN109728254A (en) * | 2018-12-03 | 2019-05-07 | 浙江大学 | A kind of technology of preparing of negative electrode of lithium ion battery porous copper foil |
| TWI703238B (en) * | 2019-03-19 | 2020-09-01 | 利佳精密科技股份有限公司 | Microporous copper foil manufacturing method and microporous copper foil |
| CN113097450A (en) * | 2019-12-23 | 2021-07-09 | 英特赛尔股份有限公司 | Method for insulating lithium-ion electrochemical cell components with metal oxide coatings |
| WO2021248848A1 (en) * | 2020-06-12 | 2021-12-16 | 九江德福科技股份有限公司 | Method for manufacturing perforated copper coil for shielded cathode plate |
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| JP2006193825A (en) * | 2004-12-13 | 2006-07-27 | Mitsui Mining & Smelting Co Ltd | Perforated electrolytic metal foil, perforated electrolytic metal foil with carrier substrate and their production methods |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993153A (en) * | 2015-07-13 | 2015-10-21 | 深圳市信宇人科技有限公司 | Production method of microporous copper foil, microporous copper foil and production device thereof |
| CN108110329A (en) * | 2018-01-09 | 2018-06-01 | 深圳市信宇人科技股份有限公司 | For making the production method of the cathode roll of metal micro-holes and its cathode roll |
| CN109065833A (en) * | 2018-06-28 | 2018-12-21 | 合肥国轩高科动力能源有限公司 | Surface treatment method for porous current collector of silicon-carbon composite negative plate of lithium battery |
| CN109065833B (en) * | 2018-06-28 | 2021-04-02 | 合肥国轩高科动力能源有限公司 | Surface treatment method for porous current collector of silicon-carbon composite negative plate of lithium battery |
| CN109103503A (en) * | 2018-07-18 | 2018-12-28 | 惠州亿纬锂能股份有限公司 | The preparation method of lithium ion battery |
| CN109148892A (en) * | 2018-08-07 | 2019-01-04 | 北京科技大学 | A kind of preparation method of the three-dimensional porous copper foil of anode of lithium ion battery collector |
| CN108950608A (en) * | 2018-08-16 | 2018-12-07 | 安徽铜冠铜箔有限公司 | A kind of new netted copper foil preparation method |
| CN109494374A (en) * | 2018-11-12 | 2019-03-19 | 桑顿新能源科技有限公司 | Lithium ion battery silicon-carbon cathode piece and preparation method thereof |
| CN109728254A (en) * | 2018-12-03 | 2019-05-07 | 浙江大学 | A kind of technology of preparing of negative electrode of lithium ion battery porous copper foil |
| TWI703238B (en) * | 2019-03-19 | 2020-09-01 | 利佳精密科技股份有限公司 | Microporous copper foil manufacturing method and microporous copper foil |
| CN113097450A (en) * | 2019-12-23 | 2021-07-09 | 英特赛尔股份有限公司 | Method for insulating lithium-ion electrochemical cell components with metal oxide coatings |
| WO2021248848A1 (en) * | 2020-06-12 | 2021-12-16 | 九江德福科技股份有限公司 | Method for manufacturing perforated copper coil for shielded cathode plate |
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